Sarnówko was formerly part of the German Empire. In the German Empire, the place was called Fischerhof.
The place is now called Sarnówko and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Scharnowen | German Empire | Ortelsburg | 1938 |
| Fischerhof | German Empire | Ortelsburg | 1939 |
| Sarnówko | Under Polish administration | Szczytno | 1945 |
| Sarnówko | Poland | Olsztyn | 1992 |